From 01584fa8d41cda0d4ed284a205f11f24bdb35d50 Mon Sep 17 00:00:00 2001
From: mattias <nc-gaertnma@netcologne.de>
Date: Thu, 27 Dec 2018 13:49:32 +0000
Subject: [PATCH] codetools: fixed parsing $IFOpt if option is not defined

git-svn-id: branches/fixes_2_0@59915 -
---
 components/codetools/linkscanner.pas | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/codetools/linkscanner.pas b/components/codetools/linkscanner.pas
index 200c7ce23f..0aa8030186 100644
--- a/components/codetools/linkscanner.pas
+++ b/components/codetools/linkscanner.pas
@@ -4198,6 +4198,7 @@ end;
 function TLinkScanner.IfOptDirective: boolean;
 // {$ifopt o+} or {$ifopt o-}
 var Option, c: char;
+  v: String;
 begin
   inc(IfLevel);
   if StoreDirectives then
@@ -4212,7 +4213,8 @@ begin
     if (SrcPos<=SrcLen) then begin
       c:=Src[SrcPos];
       if c in ['+','-'] then begin
-        if (c='-')<>(Values.Variables[CompilerSwitchesNames[Option]]='0') then
+        v:=Values.Variables[CompilerSwitchesNames[Option]];
+        if (c='-')<>((v='0') or (v='')) then
         begin
           SkipTillEndifElse(lssdTillElse);
           exit;